package org.csmzxy.class2333.innerclass;

public class Calculator {
    public void performCalculation(int num1, int num2, char operation) {
        class OperationCalculator {
            public int add() {
                return num1 + num2;
            }
            public int subtract() {
                return num1-num2;
            }
        }
        OperationCalculator calculator = new OperationCalculator();
        if (operation == '+') {
            System.out.println("计算结果：" + calculator.add());
        } else if (operation == '-') {
            System.out.println("计算结果：" + calculator.subtract());
        }else {
            System.out.println("发生错误");
        }
    }
}
